tgatoppm(1) on Linux
The text d61466ad6c0c, as Debian 7 (Wheezy), Debian 6.0 (Squeeze), Debian 5.0 (Lenny), Debian 4.0 (Etch), Debian 3.1 (Sarge), Debian 3.0 (Woody) shipped it.
convert TrueVision Targa file into a portable pixmap
Flags it lists
-
--alphaout -
--headerdump